1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Brrunno [24]
3 years ago
12

Most reactions give off energy in the form of heat and are called what​

Chemistry
2 answers:
givi [52]3 years ago
7 0

Answer:

Exothermic reaction.

Explanation:

Alexxandr [17]3 years ago
4 0
That would be exothermic. Exothermic reactions are processes that release energy, usually in the form of heat or light. Energy is released because the total energy of the products is less than the total energy of the reactants.
You might be interested in
What tool do you use to measure a rectangle?
pashok25 [27]

Answer:

Ruler

Explanation:

3 0
2 years ago
Read 2 more answers
Dalton's law of partial pressures states that the total pressure exerted by a mixture of gases is the sum of the pressures exert
Damm [24]

Answer: The given statement is true.

Explanation:

According to the Dalton's law, total pressure of a mixture of gases that do not react with each other is equal to the partial pressure exerted by each gas.

The relationship is as follows.

          p_{total} = \sum_{i=1}^{n} p_{i}

or,        p_{total} = p_{1} + p_{2} + p_{3} + p_{4} + ......... + p_{n}

where,  p_{1}, p_{2}, p_{3} ....... = partial pressure of individual gases present in the mixture

Also, relation between partial pressure and mole fraction is as follows.

                 p_{i} = p_{total} \times x_{i}

where,      x_{i} = mole fraction

Thus, we can conclude that the statement Dalton's law of partial pressures states that the total pressure exerted by a mixture of gases is the sum of the pressures exerted independently by each gas in the mixture, is true.              

5 0
3 years ago
what is the molecular formula of a compound that contains 38% c, 45% n and 16% h if 0.157 g of the compound occupies 125 ml with
EastWind [94]

The molecular formula of the given compound is CH₅N.

<h3>What is the ideal gas equation?</h3>

The ideal gas law has defined the product of the volume and pressure as equal to the product of the gas constant (R) and absolute temperature of the gas.

The mathematical equation of the ideal gas law is as follows:

PV = nRT

The temperature of the compound, T =  22° C = 295 K

The pressure of the compound, P = 99.5 KPa = 0.982 atm

The volume of the compound, V = 125 ml = 0.125 L

0.125 × 0.982 = (0.157 g/M) × 0.082 ×295

M = 31 g/mol

A number of moles of C = 0.157 ×0.37/12  = 0.00484

A number of moles of N = 0.157 ×0.45/14  = 0.00504

A number of moles of H = 0.157 ×0.16/1  = 0.0251

The simplest ratio of C: N: H is 1 : 1 : 5

The empirical formula of the given compound is CH₅N.

The molecular formula of the compound is CH₅N as the molecular mass is equal to 31 g/mol.

Learn more about ideal gas equation, here:

brainly.com/question/3637553

#SPJ1

4 0
10 months ago
Oxygen and copper are examples of what?
taurus [48]
Two different elements
5 0
3 years ago
Read 2 more answers
A solution is initially 0.10m in mg2+(aq) and 0.10m in fe2+(aq). solid naoh is slowly added. what is the concentration of fe2+ w
dexar [7]

Mg(OH)₂  ⇄ Mg²⁺   +   2 OH⁻

Ksp = [Mg²⁺] [OH⁻]²

6.0 x 10⁻¹⁰ = 0.10 x [OH⁻]²

[OH⁻] = 7.746 x 10⁻⁵ M

when Mg(OH)₂ 1st precipitates, [OH⁻] = 7.746 * 10⁻⁵ M

Fe(OH)₂   <—>   Fe²⁺   +   2OH⁻

Ksp = [Fe²⁺] [OH⁻]²

7.9 x 10⁻¹⁶ = [Fe²⁺] x (7.746 x 10⁻⁵)²

[Fe²⁺] = 1.32 x 10⁻⁷ M

Answer: 1.32 x 10⁻⁷ M

5 0
3 years ago
Other questions:
  • Elabora un texto escrito en el que explica las funciones principales del sistema nervioso y como responde a los estímulos extern
    12·1 answer
  • What do repeated trials in an experiment allow a scientist to do?
    11·1 answer
  • Give the major force between acetone and chloroform.
    5·1 answer
  • In a distillation operation, the heat added to the boiler a) increases with increase in reflux ratio b) decreases with increase
    5·1 answer
  • An electron charge e mass m and a positron charge e mass m revolve around their common center of mass under the influence of the
    7·1 answer
  • Match the procedural step to its purpose in the written procedure for the Fischer esterification of benzoic acid with methanol i
    6·1 answer
  • How many iron atoms are in Fe(NO3)2?<br><br> A. 6<br> B. 1<br> C. 3<br> D. 2
    8·2 answers
  • Which of the following is the coldest climate zone?
    5·2 answers
  • What is the oxidation state of cobalt (III)?
    5·1 answer
  • Determine the limiting reactant and calculate the number of grams of sulfur dioxide, so2, that can be formed when 27.3 g of meth
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!